Cornice-fviachine



(No Model.) s sheetssheen 1. F. M. LEAVTT.

CORNICE MACHINE.

No. 395,154. A Patented 1360.25, 1888.

mum

(No'Model.) s sheets-sheet 2.

` I'. M. LEAVITT.

CORNICE MACHINE.

'N0.s95,154. Patenfednec. 25, 1888.

Arron/vnd 8 Sheets-Sheet 3.

(No Model.)

F; M. LBAVITT. CORNICE MACHINE.

Patented Deo. 25, 1888.

Amb/VEN. C

N, PETERS` FhowLilhognphur, waahmgwn. D. c.

Miren rares arent FFME@ FRANK M. LEAVITT, OF BROOKLYN, NET YORK,ASSIGNOR TO THE VULOAN COHPAN Y, OF PHILADELPHIA, PENNSYLVANIA.

CORNICE=IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 395,154, dated December25, 1888.

Application filed December 14, 1887. Serial No. 257,848. (No model.)

To all whom it may concern:

Be it known that I, FRANK M. Lei-WITT, a citizen of the United States,residing at Brooklyn, Kings county, New York, have invented certain newand useful Improvements in Cornice Machines, fully described andrepresented in the following specification and the accompanyingdrawings, termin g a part of the same.

The object of this invention is to furnish novel means for adjusting ina machine such as described the pressing-tools toward one another.` Itis more especially intended for machines having long crossheads in whichare employed two cranks and connecting-rods for transmitting equahlemotion to both ends of such cross-heads for bending sheet-metalcornices, ttc. In such machines the connectingrods are divided in thecenter and connected zo together by expansion-nuts engaging right andleft hand screw-threads upon the connecting rods to shorten and lengthenthe same; and this invention consists in the novel means hereinaftershown and described, and

2 5 then specificall y pointed out in the claims, for

accomplishing this result.

In the drawings, Figure l represents a front elevation of an eight-footcornice-press provided with my improvements. Fig. 2 is a 3o rearelevation,partly in section where hatched, of the same. Fig-.v3 an endelevation of the same with the tightener shown in one position in fulllines and in another position in dotted lines. Fig. et is a section ofthe bed, cross-head, and tools upon a larger scale, on line :c f1: inFig. l. Fig. 5 is a side vicwof the die-holder and die upon the samescale as in Fig. et, and broken in the middle for want of room to showits entire length. Fig. 6 is a plan of one of the keys for thedie-holder upon a larger scale than Fig. 5. Fig. 7 is a plan oit thenut-beam twice the size of that shown in Fig. l. Fig. S is a view ot"the same from the side opposite to that shown in Fig. 2. Fig. E) a sideview of one expansion-nut and its worm-wheel detached from the screwsand of the same scale as Figs. 7 and 8; and Fig. 10 is a View of one ofthe connectingrods complete, with the expansion-nut shown in section,twice the size of that shown in Fig. 9.

The cornice-press shown herein is represented with vertical end frames,A A', tied together by a hed, B, and tie-rod B', and having across-head, O, suitahly fitted between 5 5 the same to slide up and downover the hed B. As shown in Fig. l, the hed is provided with a grooveddie, d, and the cross-head with a die-holder, d', carrying a die, e.rihe dieholder and die are shown in side view at Fig. 6o 5, thedie-holder being provided with two shanks, f, which are fitted tosockets in bosses s upon the cross-head, and held therein by keys g',one ot' which is shown in Fig. 6, titted to notches g2 in the edges ofthe shanks. 65 The cross head is provided with slots g, adapted toreceive the key at such point as it enters the notches g2 in the shanks.-The die e is secured in a continuous groove in the lower side of theholder d', and pins e are 7o inserted through the holder and die toretain them together.

It has been common heretofore in such cornice-presses to form each diewith shanks, as f, to fit sockets in the cross-head. In the machine as Iconstruct it I employ a holder having upon one edge shanks a means ofattachm ent to the cross-head, and upon theopposite edge a groove toreceive the smaller dies, which may be required at certain times 8o tohe used in a large press.

By my construction the die may he made of a mere strip of flatwroughtiron adapted to fit the groove in the lower side of thedieholder, and may he cheaply secured therein 8 5 by drilling holes toiit the pins c.

The key g is shown with a ring, 7l., to pull it out when required, andthe pins e may he similarly constructed, if desired.

The motive power for the cross-head is rep- 9o resented in the drawingsas a clutch-pulley,

D, actuated hy a lever, D', and treadle-rod D2. The pulley is mountedupon a shaft, t', provided at one end with a piniomj, to actuate a gear,It, upon the end ot' the crank-chaft 7c. 95 Such shaft is provided witha hent crank (or an equivalent eccentric) near each end, and

is connected with the cross-head hy right and left hand screws ZZ,pivoted, respectively, to the cranks and to pivots m upon thecross-head. roo The screws are connected by an expansionnut, fn., andare each provided with a wornr wheel, n', for rotating themsimultaneously, and with j am-nut n3.

A nut-beam, o, is provided with a bearing, 02, at each end to lit theexterior of each nut n adjacent to the worm-wheel'nf, and a worm- Shaft,p, is mounted upon such beam in bearings'o adjacent to the worm-wheel,between which bearings a worm, r, is provided to turn the worm-wheelssimultaneously when the shaft p is revolved.

In Fig. 9 the nut and its worm-wheel are show-n in detail. The nut isshaped to fit within the bearing o in each end of the beam, and therebyhold the worm meshed in the teeth of the worm-wheel in the desiredmanner. A collar, n2, is shown formed upon the nut to hold the bearing ocontiguous to the hub of the worm-wheel in the required manner. Torotate the shaft p, a shaft, p', is mounted in a bearing, 292,transverse to the beam, and is provided at one end with a pulley, q,while a pair ot ruiter-wheels, r', serve to connect the shafts p and pand to rotate the shaft p when the pulley q is revolved.

The means for revolving the pulley is shown in Figs. 2 and 3, andconsists in a grooved pulley, f, mounted upon the frame A, an endlesscord,t, carried therefrom to the pulley q, and a tightener to press thecord against the pulley t when required. The cord t is carriedhorizontally along the front of the machine and over guide-pulleys t2upon the edge of the frame A, so as to permit a vertical movement of thepulley q without affecting the tension of the cord. To introduce thetightener between the pulley t and the pulleys t2, the pulley t isarranged upon a stud near the bottom of the frame A, andis driven by abelt, t, from a grooved pulley secured to the clutch-pulley D.

The tightener consists in a lever, u, with arms carrying' two pulleys, uand u2, and is furnishedwith a weight, if, at its inner end to keep thelever norinallyraised and the cord slackened upon the pulley 15. Thecord is car ried over one of the guide-pulleys, t2, which turn loosely,and thence passes beneath the pulleyt and over and under thetightenerpulleys u and u2, and then over the other guide-pulley, t2,back to the pulley q. The depression of the lever u overcomes the weightc and tightens the cord t', so that the motion of the pulley t istransmitted to the pulley c] and shaft p and worms r. lVhen the cord tis slack, it may readily be slipped from the pulley q by the operatorand applied again to the pulley after giving it a half-turn-that is,applying that part of the cord to the top of pulley q which was beforeapplied to the bottom. The effect of such change is to reverse themotion of the pulley q, as will be seen by reference to the arrows t andt7, applied to the upper and lower parts of the cord, Fig. 2, and whichshow plainly thatsuch parts move in opposite directions, and wouldnecessarily rotate the pulley q in opposite direction when applied tothe same side thereof. ln Fig. 2

the arrow t shows the cord moving to the left and applied to the top ofthe pulley q, which is consequently rotated in a direction oppo: site tothev hands of a clock. The arrow t shows the opposed part of the cordleading from the bottom of the pulley, moving to the right, and suchpart of the cord if applied to the top of the pulley would rotate it inthe same direction as the hands of a clock. In eshort, the leadingpartof the cord on which the arrow i is placed may be applied to the topor bottom of the pulley by the operator and determines the motion of thepulley in opposite directions. Vhen the tightener is operated, the wormsyr turn the worm-wheels n', and thus simultaneously shorten or lengthenthe cross-head connecting-rods- On account of the great reduction in thearc of movement produced by the worm-wheels n and the threads upon theconnecting-screws ZZ, one rotation of the pulleyt produces a very minutechange in the length of each connecting-rod, and the operator is thusable by a momentary depression of the tighteninglever u to produce achange of a single thousandth of an inch in the relations of the opposeddies. When the dies are properly adj usted, the slackening of thetighten er loosens the cord t and the worms and nuts n cease to move.'lo prevent any accidental shifting of the nuts, as by an unintentionalpressure upon the lever "a, jam-nuts n3 are applied to the screws Z Z,and may be tightened by the operator, if desired, to lock the nuts andscrews in their adj usted position. Such j a1n-nuts are provided withholes to turn them by means of a rod, and would obviously requireloosening before the nuts could be again adjusted by means of thetightener and cord t. In practice no difficulty is found in reversingthe relation of the cord t to the pulley q, and an actuation of the nutsn in either direction is thus effected without complicating themechanism.

In Fig. l the cross-head is shown depressed with the dies in contact, asin Fig. 4, while in Fig. 2 t-he cross-head is shown elevated with thedies separate to introduce the sheet metal for bending.

It will be obvious that the connection of the nuts n with thepower-gearing actuated by the tightening-leveru enables the operator toshorten or lengthen the cross-head connections while the cross-head isin motion, and to thus adjust the die e to or from the die d with thesheet metal between them and with out stopping the movements of thecross-head. A fresh die, c, may thus be secured to the cross-head andgradually adjusted toward the die d while in motion, or the pressure ofthe dies upon the sheet metal may be increased the machine to effect therequired adjustment of the dies.

I am aware that it is not new to use a connecting-rod with anexpansion-nut in such presses to adjust the pressure of the dies, and

IIO

or diminished at pleasure without stopping I do not, therefore, claimsuch nut as my in-1 venton.

To effect a mechanical connection with the mechanism vibrated, as beforedescribed, with the nuts, I employ the flexible cord t and guide thesame horizontally across the press, so that the end which is applied tothe pulley q may be reciprocated and vibrated without affecting itstension. y

It is obvious that the die d might be replaced by a grooved holdersimilar to d', and changeable dies, either concave or convex, fitted insuch groove like the die e.

Having thus set forth the nature of my .in- Vention, what I claim hereinis- 1. In a double-crank press, the combination, with the crank-shaftand the cross-head, of two connecting-rods formed' with right and leftscrews and expansion-nuts, as described, wornrwhecls affixed to thenuts, a nut-beam journaled upon the nuts adjacent to the wormwheels, anda worm-shaft mounted upon the nut-beam with worms meshing` in suchwheels to rotate the nuts simultaneously, as and for the purpose setforth.

2. In a double-crank press, the combination, with the crank-shaft andthe cross-head, of two connecting-rods formed with right and left screwsand expansioirnuts, as described, worm-wheels affixed to the nuts, anut-beam j ournaled upon the nuts adjacent to the wormwheels, aworm-shaft mounted upon the nutbeam with worms meshing in such wheels, apulley mounted upon the nut-beam to rotate such shaft, and a cord orbelt applied to said pulley, as and for the purpose set forth.

3. In a double-crankpress, the combination, with the crank-shaft and thecross-head, of

two connecting-rods.provided with expansionnuts having worin-wheelssecured thereon and a nut-bea1n j ournaled upon the nuts adj acent t0such wheels, a worin-shaft mounted upon the nut-beam, and worms meshingin such wheels, a pulley mounted upon the nntbeam near one end of thepress to rotate the worm-shaft, guide-pulleys mounted upon the framenear the other end of the press, a driving-pulley located upon the framebelow said guide-wheels, and a tightener interposed between thet'lrivingwvheel and guide-wheels and weighted to normally relax thecord, substantially as herein shown and described.

4. In a double-crank press, the combination, with the crank-shaft andthe crosshead, of two coimecting-rods formed with right and left screwsand expansion-nuts, described, worin-wheels affixed to the nuts, anut-beam journaled upon the nuts adjacent to the worm wheels, aworm-shaft mounted upon the nut beam with worms meshing in such wheels,a pulley mounted upon the nut-beam to rotate such shaft, adrivingpulley, I), actuating,` the crz'tnkwshaft k', the pulley t,rotated by means of cord t* from said pulley D, and cord t', eX- tendedfrom pulley t to the pulley upon the nut-beam, and a ti ghtener appliedto said cord, the whole arranged and operated substantially as setforth.

In testimony whereof I have hereunto setl my hand in the presence of twosubscribing witnesses.

'FRANK M. LEAVIHT.

Titnessesz G. W. FERRIss, F. C. B. PAGE.

